Dell RAID is 01 not 10
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So very important discovery today. Dell PERC controllers say that they implement RAID 10 and their docs even include diagrams to show that it is RAID 10 but the actual RAID level is 01 which uses the same capacity and has the same performance but is dramatically less reliable.
This is really important to know, especially with people attempting to use large shared storage like in a VRTX. This can really catch people by surprise.
So typically Dell PERC setup will be RAID 01 for four drives and RAID 6 for larger arrays.
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So did they drop true RAID 10 support?
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Their tech has stated that they never had it!
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@scottalanmiller
Wow -
It's their use of the made up term "span" that is causing all kinds of confusion.
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We are digging hard to get answers. Lots if conflicting information.
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So we were never really using RAID 10? Sounds like if someone loses their data they could be in for some kind of legal suit.
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Trying to really get confirmation. The old belief was that it was RAID 100 which is mathematically just as safe as RAID 10. But we don't know for sure yet.
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I had someone tell me that before but the Perc stated it was 10.
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@technobabble I think we safely know it isn't 10. Dell refuses to commit to it being 10. They skirt the question every time. They've confirmed that at least one if their vendors mislabels it.
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So does that mean no manufacturer is really supporting RAID 10?
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@thecreativeone91 don't know. But only Dell and LSI have the red flag "spans" thing going on which has no context in true RAID 10.
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That's concerning, did they ever figure it out?
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Make sure that you post back here when you learn more. Everyone is, I imagine, pretty interested in this one.
